> -----Original Message-----
> From: Wouter van Ooijen [mailto:wouter@VOTI.NL]=20
> Sent: Thursday, March 13, 2003 6:48 AM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [PIC]: Doing modulated IR with 16F628 internal clock
>=20
>=20
> > I suspect your real problem was not the 1200 baud drift,=20
> but the 38KHz=20
> > carrier drift going outside the IR receiver passband.
>=20
> Not likely, a 5% shift will kill asynchronous communication,=20
> but the common IR receivers that I know [=20
> http://www.vishay.com/docs/82030/82030.pdf ] a > 5% shift will=20
> reduce the sensitivity to 60%, hence the effective distance to 77%.
>=20

Right.  I was checking the signal on the decoder, and all the bits were
there, it was just variations in the bit times messing up the receiver's
ability to interpret the serial stream.

Alex

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